rust-crafting-interpreters-.../src/errors.rs

24 lines
611 B
Rust
Raw Normal View History

/// Error handler. Can be used to print error messages; will also retain the
/// current error status.
#[derive(Default, Debug)]
pub struct ErrorHandler {
had_error: bool,
}
impl ErrorHandler {
/// Check whether this handler reported an error.
pub fn had_error(&self) -> bool {
self.had_error
}
/// Report an error.
pub fn error(&mut self, line: usize, message: &str) {
self.report(line, "", message)
}
fn report(&mut self, line: usize, pos: &str, message: &str) {
self.had_error = true;
println!("[line {line}] Error{pos}: {message}")
}
}